Central monitor



FIG. 1 is a perspective view of a central monitor showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a right side elevational view thereof, with the left sidebeing a mirror image thereof;

FIG. 5 is a front elevational view thereof;

FIG. 6 is a rear elevational view thereof.

The ornamental design for a central monitor, as shown.